Textbook Question
Show how you would synthesize octan-2-one from each compound. You may use any necessary reagents.
(e) heptanoic acid
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Ch. 18 - Ketones and Aldehydes
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 18, Problem 55f
Show how you would synthesize octan-2-one from each compound. You may use any necessary reagents.
(f) CH3(CH2)5CN
Verified step by step guidance1
Step 1: Begin by hydrolyzing the nitrile group (-CN) in CH3(CH2)5CN to convert it into a carboxylic acid. Use acidic or basic hydrolysis conditions, such as H3O+ (acidic) or NaOH followed by acidification. This will yield CH3(CH2)5COOH.
Step 2: Convert the carboxylic acid (CH3(CH2)5COOH) into an acid chloride (CH3(CH2)5COCl) using a reagent like thionyl chloride (SOCl2). This step activates the carboxylic acid for further reactions.
Step 3: Perform a Friedel-Crafts acylation reaction to introduce the ketone functionality. React the acid chloride (CH3(CH2)5COCl) with ethane (CH3CH3) in the presence of a Lewis acid catalyst, such as AlCl3. This will yield octan-2-one.
Step 4: Purify the product octan-2-one using techniques like distillation or chromatography to ensure the desired compound is isolated.
Step 5: Confirm the structure of octan-2-one using spectroscopic methods such as IR (to check for the carbonyl group) and NMR (to verify the positions of the protons and carbons).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Nitrile Chemistry
Nitriles, such as CH3(CH2)5CN, can be converted into ketones through hydrolysis. This process involves the addition of water in the presence of an acid or base, leading to the formation of a carboxylic acid, which can then be further reduced to yield the corresponding ketone. Understanding the reactivity of nitriles is crucial for synthesizing octan-2-one from this starting material.
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Reduction Reactions
Reduction reactions are essential in organic synthesis, where a compound gains electrons or hydrogen, often resulting in the formation of alcohols or ketones. In the context of synthesizing octan-2-one, the reduction of a carboxylic acid derived from the nitrile can be achieved using reagents like lithium aluminum hydride (LiAlH4) or sodium borohydride (NaBH4), which convert the acid to the desired ketone.
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Synthesis Pathways
Synthesis pathways refer to the step-by-step methods used to convert starting materials into target compounds. For octan-2-one, a clear pathway from CH3(CH2)5CN involves hydrolysis to form a carboxylic acid followed by reduction to the ketone. Understanding these pathways allows chemists to design efficient and effective routes for synthesizing complex organic molecules.
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Related Practice
Textbook Question
Show how you would synthesize octanal from each compound. You may use any necessary reagents.
(b) non-1-ene
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Show how you would synthesize octanal from each compound. You may use any necessary reagents.
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Textbook Question
Show how you would synthesize octanal from each compound. You may use any necessary reagents.
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Textbook Question
Show how you would synthesize octan-2-one from each compound. You may use any necessary reagents.
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Show how you would synthesize octan-2-one from each compound. You may use any necessary reagents.
(c) 2,3-dimethylnon-2-ene
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